search.m

 RAC(self, results) = [self.searchCommand.executionSignals flattenMap:^(RACSignal *querySearchSignal) {
    @strongify(self);
    return [[querySearchSignal
        concat:[self.searchMoreCommand.executionSignals concat]]
        scanWithStart:@[] reduce:^(NSArray *running, NSArray *next) {
            return [running arrayByAddingObjectsFromArray:next];
        }];
}];